to the abandoned Sacred Beasts S01E08 - Songstress of Sleep

The North Patria Union tries to quickly exterminate all of the Incarnates before the impending war. The captain of the Coup de Grace, Claude, had appeared in the port town of Port Gulf. Schaal is also there and happens to hear a beautiful singing voice. She heads toward the cave that the voice is coming from and encounters the Incarnate Siren, otherwise known as Beatrice, and her friend Charles.